{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{S[table-format=1.3]S[table-format=1.3]S[table-format=1.3]S[table-format=1.3]}}
\toprule
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{\specialcell{Dictator \\ Game}}&\multicolumn{1}{c}{\specialcell{Trust \\ Game 1}}&\multicolumn{1}{c}{\specialcell{Trust \\ Game 2}}&\multicolumn{1}{c}{\specialcell{Social \\ Proximity}}\\
\midrule
\midrule
Sample mean         &      0.3591         &      0.3984         &      0.3804         &      0.5481         \\
Sample standard deviation&    (0.2490)         &    (0.2670)         &    (0.2477)         &    (0.2575)         \\
\midrule \multicolumn{4}{l}{\textit{Panel A: Average coethnicity effect$^a$}} \\ \quad Coethnicity effect&0.0184$^{***}$         &0.0301$^{***}$         &      0.0028         &0.0819$^{***}$         \\
                    &    (0.0038)         &    (0.0043)         &    (0.0022)         &    (0.0052)         \\
\midrule\multicolumn{4}{l}{\textit{Panel B: Interaction of hydrocortisone and coethnicity$^b$}} \\ \quad Interaction effect&      0.0015         &-0.0178$^{**}$         &     -0.0021         &     -0.0052         \\
                    &    (0.0074)         &    (0.0084)         &    (0.0041)         &    (0.0101)         \\
\midrule Participants&     {1,784}         &     {1,784}         &     {1,784}         &     {1,784}         \\
Decisions per participant&         {6}         &         {6}         &        {30}         &         {4}         \\
Decisions           &    {10,704}         &    {10,704}         &    {53,520}         &     {7,136}         \\
\bottomrule
\multicolumn{5}{p{0.73\hsize}}{\footnotesize \textit{Notes}: The table reports estimates of a version of equation~\eqref{eqn: Main Specification} with player 1 fixed effects. Variables are as described in the text.  Social proximity refers to the average measures of likelihood to be friends, trust and closeness rescaled to lie between 0 and 1.   Standard errors clustered at the participant level are reported in parentheses. Significance is denoted by \sym{*} \(p<0.1\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\).}\\
\end{tabular}
}
